Food related sounds very intriguing, there are lots of possibilities. Food has been important in all Trek series. Kingon Gagh, Romulan Ale, Tilly making snarky comments at the passive aggressive food slots... there's no shortage of scope.

An idea that I've had knocking about for a few weeks is something based around a Museum of the Federation. If you had to curate such a place, what artefacts would you have? The Federation Charter? Zefram Cochrane's jukebox? A dilithium crystal from the first commissioned starship? A Federation starmap?

I don't know, I think the food one has more potential straight out the box, maybe the Federation Museum idea needs a little longer to gestate.